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(No Model.)

0. R. JENNISON.

TELEPHONE DUMMY. No. 263,526. Patented Aug. 29, 1882.

Urvrren TATES ATENT Orrree.

CHARLES R. JENNISON, OF BOSTON, MASSACHUSETTS, ASSI G NOR OF TWO- THIRDSTO WILLIAM A. MAOLEOD AND MlLAN F. STEVENS, BOTH OF SAME PLACE.

TELEPHONE-DUMMY.

SPECIFICATION forming part of Letters Patent No. 263,526, dated August29, 1882.

Application filed May 19, 1882.

To all whom it may concern:

Be it known that I, UHARLES 1t. JENNISON, of Boston, county of Suffolkand State of Massachusetts, have invented a new and Im- 5 provedTelephone-Dummy, of which the following is a full, clear, concise, andexact description, taken in connection with the drawings accompanyingand forming a part hereof, of which Figure 1 is an elevation showingthedummy and its mechanism through two stories of a building. Fig. 2 is afront view, showing another style of slide and ways.

My invention consists in the arrangement, with suitable mechanism, morefully described below, of telephone-instruments on a slide moving inways, so that the telephone may be moved from one room or floor in abuilding to another by simply moving the slide, and may be used at anygiven point.

My invention may be best understood by reference to the drawings.

A is a floor of the building.

The dummy shown extends perpendicularly, and is designed for raising orlowering the telephone, so that it may be used on each floor. It will beobvious, however, that it may as well be made to extend horizontallyfrom one apartment to another on the same floor.

0 Care metallic rods or tubes, between which the slide E moves, theslide being provided with guiding-grooves a a on either side, whichallow its edges to partly embrace the rods. The slide is provided with arope or cord, F, which passes over a pulley above and is weighted, therope serving as a convenient means for raising or lowering the slide.The battery-jars are conveniently placed in a closet atthe bottom ofthedummy-well. The batterywires 6 I) pass from the jars up along thewooden uprights H H, which stand beside the rods 0 O, the wires beingbroken at the station on each floor where the instrument is designed tobe used by the insertion of the leafsprings c c c c, which, as the slidereaches the station, come in contact with the projecting feet at d onthe slide, and thus make the battery-connection withthe instrument. Theline and ground connections are made by means of the leaf-springs j, setin the grooves a a and held against the metallic rods O O by spiral (Nomodel.)

spring 70. The springs fare metallically connected through the slidewith the instrument, and one of the metallic rods has aground-connection, while the other has a line-connection.

In Fig. 2 my invention is shown with a slightly different arrangement ofthe parts. The way on the right, by which the slide is guided in itspassage, is shown tubular, with the raising and lowering rope F passingdown through it and weighted by lead rings R R, while on the left ofFig. 2 the way is made from a piece of tubing split centrally andsecured to the only wooden upright H which is used. The wooden uprightis used as a support for the battery-wire b as it passes up from thebattery-jars at the bottom of the dummywell, and also to bear the spring0, which comes in contact with the foot d as the slide reaches thestation and makes the battery-connection. The metallic rod I on theoutside of the upright H is used to make the other batteryconnection,and is metallically connected with the instrument by the band N, the endof which is in contact with the surface of I. It 75 will be obvious,however, that in place of rod I and upright H wires properly insulatedand connected by means substantially as shown might be used, thussecuring greater compactness when desired. The metallic strip 8 on theright of the slide in Fig. 2 is not for the purpose of making anelectrical connection, but merely to steady the slide and insure itsmovement on the ways. The instruments shown on the slide E in Fig. 2 arealso differcut, the call being made by a push-button, M, instead of bythe magneto-machine, which will be recognized as on the slide in Fig. 1.Call -bells may of course be inserted, and when the dummy is used in afactory where there is considerable noise from machinery I find itconvenient to locate the call-bell in the central part of the room,where it may more readily be heard, or even to useseveral calls locatedin different portions of the room.

By means of my invention several oliices in one building or the variousfloors ot' a building may each be provided with a station and oneinstrument made to serve all the stations.

The method of using the dummy is very IOC' simple, and it may be usedwith any form of telephone. The party wishing to use the instrument goesto the dummy, and, if the slide bearing the instrument is not at hisstation, seizes the rope and pulls the slide up or down until the feet(1 (I come in contact with the springs c c, which completes thebattery-circuit, and the telephone is before him, ready for use.

I claim- 1. The combination of a telephone receiver and transmitter withthe movable slideE, ways or tracks 0 O, and means for raising orlowering the slide, substantially as shown, and for the purposes setforth.

2. The metallic projections d d, set on the movable telephone-slide Eand in metallic connection with the instruments on the slide, incombination with springs c 0, connected with the battery for the purposeof makingthe battery-circuit when the slide is at a station,substantially as described.

3. The projections d (I, connected with the instruments on the slide,and springs 0 0, connected with the battery, in combination with thesprings ffand ways O O, as shown, for making line and ground connectionsor lineconnection alone, substantially as described.

4. The springs f, set in a movable slide, E, and metallically connectedwith the instruments on the slide, in combination with rods 0 C,connected Willi the line and ground wires for the purpose of keeping theinstrument in the line and at the same time allowing its free passage onthe ways from one station to another, substantially as described.

OHAS. R. JENNISON.

Witnesses:

WM. A. MAoLEoD, ROBERT VVALLACE.

